.one {
  margin: 50px auto;
  height: 145px;
  width: 100%;
  overflow: hidden;
  position: relative;
  padding: 35px;
}
.one ul {
  height: 75px;
  width: 100000px;
  position: absolute;
  left: 0;
} /*ul width閻ㄥ嫬顔旀稉宥堝厴鏉╁洤鐨�*/
.one ul li {
  display: block;
  float: left;
  margin: 5px;
  height: 75px;
  border-radius: 5px;
  position: relative;
}
.one ul li a {
  display: inline-block;
  height: 75px;
  width: 306px;
}
.one ul li img {
  border-radius: 5px;
  display: block;
  width: 100%;
  filter: grayscale(100%);
  opacity: 0.6;
}
.one ul li a span {
  height: 0;
  display: block;
  background: rgba(0, 0, 0, 0.4);
  position: absolute;
  bottom: 0;
  color: #fff;
  font-size: 0px;
}
.one ul li a:hover span {
  height: 75px;
  line-height: 75px;
  font-size: 20px;
  text-align: center;
  transition: all 0.7s;
}